The idea is to fill it to the top with some alcoholic beverage and commence drinking. When it gets to 4:20, light up a fatty. When it gets to 10/6 pop some acid. When it gets to 3.14, hold the cup to a mirror and trip out over the fact that 3.14 backwards looks remarkably like PIE.

*yes I made most of that up and no I don't think anyone should try it.